Flue-cutter.



B. HENRIKSON. FLUE CUTTER. APPLICATION FILED JAIms, 1914.

Patented Aug. 25

THE I oRR/s PETERS CIL PHOTO-LITHD., WASHINGFON. D. l;

BERNHARDT HENRIKSON, OF CHICAGO, ILLINOIS.

FLUE-CUTTER.

Specication of Letters Patent.

Patented Aug. 25, 1914.

Application filed January 28, 1914. Serial No. 815,018.

To all whom it may concern:

Be it known that I, BERNHARDT I-IEN- RrnsoN, a citizen of the UnitedStates, residing at Chicago, Cook county, Illinois, have inventedcertain new and useful Improvements in Flue-Cutters, of which thefollowing is a specification. Y

My invention relates to what are known as flue cutters, as exemplifiedby my prior Patent No. 616,907 issued to me on April 3, 1900, and theobject of my invention is to improve this type and general constructionof iue cutter and to render the same more efficient and to increase thecapacity thereof by providing means whereby it may be used for dierentsized flues.

Another object of the invention provides a signal device such as awhistle operated by the same motive fluid that operates the cutter, toindicate the completion of the work of cutting.

In the drawing, Figure 1 is a central longitudinal section of the fiuecutter proper, the motor not being shown; Fig. 2 an elevation of thefront end of the machine; Fig. 3 a section on the line 3-3 of Fig. 1;Fig. t a section on the line 1 -4: of Fig. 1; Fig. 5 a perspective of anadjustable ring; Fig. 6 an end view of the stem; Fig. 7 a perspective ofthe eccentric bearing block; Fig. 8 a perspective of one of the thrustrollers; Fig. 9 an elevation of the stop or means for operating thewhistle; Fig. 10 a section of such whistle; and Fig. 11 a perspective ofa fastening block.

Referring to the present embodiment of my invention, it will beunderstood that any suitable motor (not shown) operated by compressedair or other motive fluid may be employed and that the same motive fluidused to operate the motor and to rotate the fiue cutter is employed tomove the cutting tool outwardly to its work. The mechanism herein showntherefore comprises merely the tool spindle and associated parts such asthe cutter itself, fluid pressure mechanism for moving the sameoutwardly to its work, the thrust rollers forming one feature of myinvention, the removable collars and bearings forming another featurethereof, and the whistle forming still another feature.

The tool spindle comprises a stem 1 on whose inner end is mounted acylinder 2 within which travels a piston 3. This piston is normally heldto its inward position shown in Fig. 1 by means of a spring 4 containedwithin the hollow piston stem 3*- and interposed between the piston heador piston proper and the annular shoulder 1a of the stem. The stem isprovided at its inner end with a port 5 adapted to conduct thecompressed air to the cylinder 2 in front of the piston and to therebyforce the latter outwardly against the tension of the spring 4.

In the inward end of the stem there is mounted to reciprocate in adirection transverse of the axis of the stem a cutter support or block 6in whose outer end is rotatably mounted the cutter 7 This block is movedoutwardly by the movements of the piston 3 through the medium of the camlever 8 pivoted at 9 with its forward end bearing` underneath the block6 and with-its rearward end which is fashioned as a cam, in contact withand operated by a roller 10 mounted in the piston stem 3a. This camlever is held in the normal position shown in Fig. 1 by the spring 11.It will be understood that when the piston 3 is moved outwardly the camlever will be rocked in a clockwise direction and the cutter block andits cutter move outwardly to the work, these movements taking placeduring the rotary movements of the entire structure by means of themotor (not shown) which is attachable to the inner end of thestem 1.

The stem 1 terminates at its outer end in a plate 12 whose inner faceforms one of the bearing or guiding surfaces for the block 6. To thisplate is secured in a suitable manner, as by means of the screws 13 aremovable plate 111 which is provided on the side of the machineopposite the cutter with a pair of recesses 15, each recess beingprovided through the bottom thereof with two holes 16 arranged on eitherside of the central axis of the recess and inwardly thereof, that istoward the central axis of the stem 1, as clearly indicated in Fig. 2.In each one of these recesses is located an eccentric bearing block 17shown in perspective in Fig. 6. Each block is in the form of a shortcylinder provided on its outer end with an eccentric projecting pin 18adapted to enter one or the other of the holes 16, and provided with aneccentric bearing opening 19 entering its inner end.

The stem 1 has intermediate its length a depending portion 20 which isprovided with circular recesses 21 similar to the recesses l5 and inalinement therewith, such recesses being also provided with holes 22similar to the holes 16 and also containing eccentric bloclrs 23 similarto the blocks 17. The pairs of `blocks 15 and 23 are bearing blocks fora pair of thrust rollers 24, each having at its ends gudgeons 25 adaptedto enter the eccentric bearing openings in the.

bearing blocks.

rollers beyond the blocks 17 and 23.

location or' the pins 18 in one of the holeslG or 2.2 and the otherposition by the location of the pin in the other one of these pairs of iholes. Consequently by merely removing the outei plate 14 and therebywithdrawing the rolls the bearing blocks may be adjusted to the otherposition thereby causing the thrust rollers to project more or less, asthe l case may be.

The tool stock or stem is provided with an outer swiveled collar 2Ghaving a hub portion 26:L between which and the intermediate portion ofthe stem 1 is interposed an inside rotatable collar 27fastened to thestem 1 in suitable manner, preferably by the two set screws 27 and 27h,the former of which abuts the stem and the latter of which slightlyenters the same. rlhe inner collar has a circumferential groove 27C andthe outer collar has a pair of opposite slots 26b adapted to registerwith the groove 27, these slots and groove being of a size to receivethe pair of radius plates 28 which travel in such groove in therotations of the collar 27. ln order to hold these plates in loclringposition l employ an outer locking ring or sleeve 29 having a pair of'opposite slots 2WL corresponding to the slots 26h. When the plates 28are to be inserted in place the slots 26b and 29u are in register andafter such plates are positioned the locking sleeve is turned to theposition shown in Fig. L1 so that such plates cannot escape.

To provide for cutting off different lengths oi flues the outside collarwhich abuts the end of the flue shown at A is adjustable, together withthe inner collar longitudinally of the stem. ln adjusting, the setscrews are loosened, the inside collar then adjusted and the screws thentightened, the screw 27l0 entering the proper one of a plurality ofholes 27d in the stem.

The alarm whistle, which is illustrated in F ig. 10 is mounted upon thepiston head and projects therethrough so as to communicate with thefluid pressure side of such piston. As shown, the whistle comprises aWhistle shell 80 having a whistle opening 30a and a valve 31 governingthe communication between the pressure side of the piston and theinterior of the shell. This valve has a Each block has two posi- 1tions, one position being represented by the` stem 32passing through astationary block post 35 attached to the stem l and having a tubularportion 5EL in which is adjustably mounted a rod 36, held in adjustableposition within such tubular portion by means of the set screw 37. Bythese means the rod 36 may be moved inwardly or outwardly as to regulatethe exact time of the sounding ofthe whistle. lWhen the flue cutter hasbeen moved outwardly sufiiciently far to complete its work the whistleis sounded automatically whereupon the operato-r shuts ofi" the supplyof motive `fluid to the motor and to the piston 3 by means of a throttlevalve, not shown.

l claim:

1. A rotary flue cutter comprising a tool stock, an outwardly movablecutter mounted on one side of the tool stock, fluid pressure operatedmechanism for moving the cutter outwardly, and thrust rollers mounted inthe tool stock on t-he opposite side thereof, the cutter and rollersbeing in the same plane which is transverse of the tool stocl; and atright angles to the axes of such cutter and rollers.

2. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein7 Huid pressure operated mechanism for moving the cutteroutwardly, and a pair of thrust rollers mounted in the tool stock on theside opposite the cutter and on either side of a diametrical linepassing through the cutter, the cutter and rollers being in the saineplane which is transverse of the tool stock and at right angles to theaXes of such cutter and rollers.

3. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, and thrust rollers mounted in the tool stock opposite thecutter, and having adjustable bearings.

4. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, eccentric bearing blocks adjustably mounted in the toolstock, and a thrust roller having gudgeons mounted to rotate in theblocks.

5. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moviis iao

ing the cutter outwardly, eccentric bearing blocks adjustably mounted inthe tool stock, and a thrust roller having gudgeons mounted to rotate inthe blocks, said blocks each having a projecting pin andthe tool stockhaving a recess to receive a block and a plurality of holes in suchrecess in one of which holes such pin is received.

6. A rotary iiue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, said tool stock including a removable plate and collar eachhaving recesses in alinement, eccentric bearing blocks adjustablymounted in said recesses, and a thrust roller having end gudgeonsmounted to rotate in the blocks.

7. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein,

r fluid pressure operated mechanism for moving the cutter outwardly,said stock including a plate having a circular recess provided with twoholes eccentric thereof and such having a similar recess in alinementwith the first named recess, cylindrical bearing blocks in saidrecesses, each block having on its outer side an eccentric pinprojection adapted to enter one or the other of said holes and on itsVouter side an eccentric bearing opening, and a thrust roller havinggudgeons at opposite ends entering such eccentric bearing openings.

8. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, said stock including a plate having a circular recessprovided with two holes eccentric thereof and also including adetachable collar having a similar recess in alinement with the firstnamed one, cylindrical bearing blocks in said recesses, each blockhaving on its outer side an eccentric pin projection adapted to enterone or the other of said holes and on its other side an eccentricbearing opening, and a thrust roller having gudgeons at opposite endsentering such eccentric bearing openings.

9. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, a thrust roller mounted in the tool stock which includes aremovable outer collar having a bearing for one end of the roller andprovided with a hub portion having a slot, an inner collar in said hubportion provided with a registering slot, a plate adapted to fit intoboth slots, and a retaining ring fitting over the hub of the outercollar.

10. A rotary flue cutter comprising a tool stock, an outwardly movablecutter therein, fluid pressure operated mechanism for moving the cutteroutwardly, a thrust roller mounted in the tool stock which includes aremovable outer collar having a bearing for one end of the roller andprovided with a hub portion having a slot, an inner collar in said hubportion provided with a registering slot, a plate adapted to fit intoboth slots, and a retaining ring tting over the hub of the outer collarand having a slot adapted to register with the others, said ring beingadjustable to cover the slot in the outer collar.

11. A rotary flue cutter comprising a tool stock, an outwardly movablecutter, a cylinder, a fluid pressure actuated mechanism including apiston therein coperating with the cutter to move it outwardly, awhistle mounted in the piston and arranged to communicate with thecylinder, and means arranged in the path of the whistle to operate it.

12. A rotary flue cutter comprising a tool stock, an outwardly movablecutter, a cylinder, a fluid pressure actuated mechanism including apiston therein coperating with the cutter to move it outwardly, awhistle mounted in the piston and arranged to communicate with thecylinder, said whistle including a whistle shell and a normally closedvalve governing the communication between the cylinder and shell, andmeans arranged in the path of the whistle to operate it.

13. A rotary flue cutter comprising a tool stock, an outwardly movablecutter, a cylinder, a fiuid pressure actuated mechanism including apiston therein cooperating with the cutter to move it outwardly, awhistle mounted in the piston and arranged to communicate with thecylinder, said whistle including a whistle shell, a normally closedvalve governing the communication between the cylinder and shell, and aprojecting stem for said valve, and means arranged in the path of thevalve stem to open the valve and thereby operate the whistle.

14. A rotary flue cutter comprising a tool stock, an outwardly movablecutter, a cylinder, a fluid pressure actuated mechanism including apiston therein coperating with the cutter to move it outwardly, awhistle mounted in the piston and arranged to communicate with thecylinder, said whistle including a whistle shell, a normally closedvalve governing the communication between the cylinder and shell, and aprojecting stem for said valve, and an adjustable rod arranged in thepath of the valve stem to open the valve and thereby operate thewhistle.

BERNHARDT HENRIKSON.

Vitnesses:

S. E. HIBBEN, ROBERT DOBBENMAN.

Copies of this patent may be obtained for dve cents each, by addressingthe "Commissioner of Patents, Washington, D. C."

